import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/login/login.vue'
import Home from '../components/login/home.vue'
import Welcome from '../components/login/Welcome.vue'
import Users from '../components/login/user/user.vue'
import Rights from '../components/login/power/rights.vue'
import Roles from '../components/login/power/roles.vue'
import Cate from '../components/login/goods/cate.vue'
import Params from '../components/login/goods/Params.vue'
Vue.use(VueRouter)
const router = new VueRouter({
  routes: [
    { path: '/', redirect: '/login' },
    { path: '/login', component: Login },
    {
      path: '/home', component: Home,
      redirect: '/welcome',
      children: [{ path: '/welcome', component: Welcome },
      { path: '/users', component: Users },
      { path: '/rights', component: Rights },
      { path: '/roles', component: Roles },
      { path: '/categories', component: Cate },
      { path: '/params', component: Params }
      ]
    }
  ]
})

// 导出 路由实例
router.beforeEach((to, from, next) => {
  // to 将要访问的路径
  // from 代表从哪个路径跳转而来
  // next 是一个函数
  // next() 放行    next('/login')强制跳转
  if (to.path === '/login') return next();
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()

})
export default router
